Guide rings

Ptfe piston guide rings

A Neuflon-PTFE compound tape intended to be used as a guiding element
Neuflon N-071 for hydaulic applications
Neuflon N-059 for pneumatic applications
Long life of both the skate and the sliding surface. Low friction and no Stick-Slip. Possibility of dry running. Exceptional resistance to the 'Diesel effect'. Ample thermal and chemical resistance. Ready availability from coils.
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Ptfe piston guide rings image
Cross Section Code S
Thickness		 F
groove diameter		 L
groove width		 G
piston-cylinder clearence		 Z
gap clearence		 length
    j8 - h8 H11 max S x 0,4   +0 / -0,3
HD SP   3,2/1,5 1,5 A - 2 x S 3,2 choice depends on
 the seal adopted
max S x 0,4		 1 + A x 0,03 3,14x(A-S)-Z
HD SP   3,2/2,5 2,5 3,2
HD SP   4,2/1,5 1,5 4,2
HD SP   4,2/2,5  2,5 4,2
HD SP   6,3/1,5 1,5 6,3
HD SP   6,3/2,5 2,5 6,3
HD SP   8,1/1,5 1,5 8,1
HD SP   8,1/2,5 2,5 8,1
HD SP   9,7/2,5 2,5 9,7
HD SP 15/2,5 2,5 15
HD SP 20/2,5 2,5 20
HD SP 25/2,5 2,5 25
HD SP 30/2,5 2,5 30

 

Coding example
housing class: HDSP
Section: 9,7/2.5 (thikness 2.5 width 9.7)
Material: N-071 (hydraulics)
Bore: 100		 HDSP - 9,7/2.5 - N-071 - 100
materials
ELASTOPLASTIC DEFORMATION / LOAD
 FRICTION COEFFICIENT / SPEED
   
      MATERIAL
CHARACTERISTICS SPECIFICATION UNITS NEUFLON-071 NEUFLON-059
SPECIFIC LOAD Qs T <=100°C   N.mm-2 2.5 2.6
Compression modulus at 1% of deformation D695-54 N.mm-2 8 8.40
Hardness D53505 Shore D 60 65
Friction Coefficient     0.12 0.13
Max. Speed   m/sec 5 5
Thermal expansion coefficient D696-70 10^-6 / °C 90 85
Continual operational Temp.   °C 250 250
Peak Temperature   °C 300 300
Compatible with hydraulic oil     yes yes
Compatible with water/oil emulsions     yes yes
Compatible with DOT 3   DOT4     yes yes
Compatible with water     no yes
Compatible with phosphoric esters     yes yes
Flammability D635-68   fire resistant fire resistant